# SemrushBot

> Semrush's backlink and keyword crawler. It is not an AI crawler, but it is usually in the top three by volume on any site, and it is the cheapest block on this list.

| field | value |
|---|---|
| operator | Semrush |
| category | SEO and backlink crawlers |
| robots.txt token | `SemrushBot` |
| user-agent contains | `SemrushBot` |
| robots.txt | obeys robots.txt (documented) |
| verify by | reverse DNS |
| published IP ranges | none published |
| prefixes mirrored | 0 IPv4 / 0 IPv6 |
| operator docs | https://www.semrush.com/bot/ |
| last reviewed | 2026-09-14 |

## What blocking it costs you

Your competitors' Semrush reports get thinner, and so do yours. No user-facing effect.

## Full user-agent string

```
Mozilla/5.0 (compatible; SemrushBot/7~bl; +http://www.semrush.com/bot.html)
```

## Block it

```
User-agent: SemrushBot
Disallow: /
```

## Allow it

```
User-agent: SemrushBot
Allow: /
```

## Ask this page a question, with one GET

A question about this page, answered by a call you can make right now — no key, no account, no JSON-RPC, nothing to assemble. The query string is already filled in with this page's own subject.

- **How do I prove a request really is SemrushBot?**  
  `curl -s 'https://www.pathwren.workers.dev/tools/verification-methods?crawler=semrushbot&s=client-dossiers'`  
  The verification method its operator actually publishes — published IP ranges, reverse DNS, or nothing at all — and the mirror of it on this host.

Every parameter above is a value the endpoint reads, not an address it visits: nothing is fetched on your behalf. Called without any parameter, each endpoint returns its own specification instead of an error.

JSON: https://www.pathwren.workers.dev/crawler/semrushbot.json · index: https://www.pathwren.workers.dev/llms.txt